Is it possible to make sugar, or do I have to purchase it?

Well, considering in reality the only way we can get sugar is from the sugar cane (not sure how they extract sugar from beets), I would suggest you have to purchase it — unless or until we get sugar cane to grow? I do know that if you add molasses to sugar you get brown sugar, but we don't have molasses in the game, wither, as far as I have seen.

Sugar has to be purchased. I'm not sure the extent you can substitute cricut flour for regular flour, but that's the only flour I know can be made.

Plant milk you get from feeding a cow a veggie treat and then milking them.